Update app and tooling

node_modules/@vercel/ruby/vc_init.rb

@@ -0,0 +1,104 @@
+require 'tmpdir'
+require 'webrick'
+require 'net/http'
+require 'base64'
+require 'json'
+
+$entrypoint = '__VC_HANDLER_FILENAME'
+
+ENV['RAILS_ENV'] ||= 'production'
+ENV['RACK_ENV'] ||= 'production'
+ENV['RAILS_LOG_TO_STDOUT'] ||= '1'
+
+def rack_handler(httpMethod, path, body, headers)
+  require 'rack'
+
+  app, _ = Rack::Builder.parse_file($entrypoint)
+  server = Rack::MockRequest.new app
+
+  env = headers.transform_keys { |k| k.split('-').join('_').prepend('HTTP_').upcase }
+  res = server.request(httpMethod, path, env.merge({ :input => body }))
+
+  {
+    :statusCode => res.status,
+    :headers => res.original_headers,
+    :body => res.body,
+  }
+end
+
+def webrick_handler(httpMethod, path, body, headers)
+  require_relative $entrypoint
+
+  if not Object.const_defined?('Handler')
+    return { :statusCode => 500, :body => 'Handler not defined in lambda' }
+  end
+
+  host = '0.0.0.0'
+  port = 3000
+
+  server = WEBrick::HTTPServer.new :BindAddress => host, :Port => port
+
+  if Handler.is_a?(Proc)
+    server.mount_proc '/', Handler
+  else
+    server.mount '/', Handler
+  end
+
+  th = Thread.new(server) do |server|
+    server.start
+  end
+
+  http = Net::HTTP.new(host, port)
+  res = http.send_request(httpMethod, path, body, headers)
+
+  Signal.list.keys.each do |sig|
+    begin
+      Signal.trap(sig, cleanup)
+    rescue
+    end
+  end
+
+  server.shutdown
+  Thread.kill(th)
+
+  # Net::HTTP doesn't read the set the encoding so we must set manually.
+  # Bug: https://bugs.ruby-lang.org/issues/15517
+  # More: https://yehudakatz.com/2010/05/17/encodings-unabridged/
+  res_headers = res.each_capitalized.to_h
+  if res_headers["Content-Type"] && res_headers["Content-Type"].include?("charset=")
+    res_encoding = res_headers["Content-Type"].match(/charset=([^;]*)/)[1]
+    res.body.force_encoding(res_encoding)
+    res.body = res.body.encode(res_encoding)
+  end
+
+  {
+    :statusCode => res.code.to_i,
+    :headers => res_headers,
+    :body => res.body.nil? ? "" : res.body,
+  }
+end
+
+def vc__handler(event:, context:)
+  payload = JSON.parse(event['body'])
+  path = payload['path']
+  headers = payload['headers']
+
+  if ENV['VERCEL_DEBUG']
+    puts 'Request Headers: '
+    puts headers
+  end
+
+  httpMethod = payload['method']
+  encoding = payload['encoding']
+  body = payload['body']
+
+  if (not body.nil? and not body.empty?) and (not encoding.nil? and encoding == 'base64')
+    body = Base64.decode64(body)
+  end
+
+  if $entrypoint.end_with? '.ru'
+    return rack_handler(httpMethod, path, body, headers)
+  end
+
+  return webrick_handler(httpMethod, path, body, headers)
+end